Alpha-(meta-hydroxyphenyl)-beta-methylamino-ethanol cyclohexylsulfamate



United States Patent u-(META-HYDROXYPHENYL)-B-METHYLAMING- EOL CYCLOHEXYLSULFAMATE Melville Sahyun and John A. Faust, Santa Barbara, Calif.; said Faust assignor to said Sahyun No Drawing. Application June 2, 1952, Serial No. 291,326

2 Claims. (Cl. 260-501) The present invention relates to a-(meta-hydroxyphenyl)- 3-methylaminoethanol cyclohexylsulfamate and is more particularly concerned with the levo isomer thereof.

Heretofore it has been recognized the a-(meta-hydroxyphenyl)-;3-methylaminoethanol possesses the physiological property of causing constriction of the blood vessels, particularly the mucosa. The compound has been marketed widely as a mineral acid salt, such as the hydrochloride salt, in dilute aqueous solution. Due to the inherent instability and the low pH of the amine in aqueous solution, it has been necessary to utilize various stabilizers and buffering agents to produce compositions which are resistant to light and do not sting when applied to the nasal passages. In addition, the solutions of this compound are bitter to the taste and require the use of sterilization preservatives. These efforts have not been entirely successful.

Therefore, it is an object of the present invention to provide a stable ot-(meta-hydroxyphenyl)-fi-methylaminoethanol-type compound, whose aqueous solution is selfsterilizing, non-irritating and is not bitter to the taste.

Another object of the present invention is to provide the cyclohexyl sulfamic acid salt of u-(meta-hydroxyphenyl) -,8-methylaminoethanol.

These and other objects of the present invention will be apparent to those skilled in the art to which this invention pertains.

Thus, the present invention comprises the novel, stable a-(meta-hydroxyphenyl)-18-methylaminoethanol cyclohexylsulfamate and a method of preparing this compound, which exhibits excellent vasoconstrictor qualities. An aqueous solution of about one-quarter to one or more percent may be very satisfactorily employed as a nasal inigant. The aqueous solutions are characterized by their non-irritating and pleasant tasting qualities. These solutions do not discolor upon prolonged exposure to air and are completely self-sterilizing so that no preservatives are required. The pH of a one percent aqueous solution is approximately 6.2, the employment of bufiers, heretofore used, thus being conveniently obviated. In addition, the levo isomer per se is more stable than the hydrochloride salt of the u (meta hydroxyphenyl) e methylaminoethanol.

The compound of the present invention is prepared by reacting approximately equimolar quantities of the levo-a- (meta-hydroxyphenyl)-fl-methylaminoethanol base with cyclohexyl sulfamic acid in the presence of an appropriate organic solvent, preferably methanol. The reaction product is recovered as a crystalline solid by fractional crystallization, or other appropriate procedure, from organic solvents, such as isopropanol or from mixtures such as isopropanol-ether combined solvents. Yields of at least eighty percent are successfully achieved.

The following example illustrates in greater detail the practice of the present invention but is not to be construed as limiting the same.

EXAMPLE LEVO-Otmeta-hydroxyphenyl) -fl-methylamin0ethan0l cyclohexylsulfamate Levo oz (meta-hydroxyphenyl)-;3-methylaminoethanol was prepared from a-(meta-hydroxyphenyl)-fi-methylaminoethanol hydrochloride (melting point 142-143 degrees centigrade; (a) 42) by treatment with excess ammonia and subsequent isolation of the product as fine white crystals.

Three and thirty-four hundredths (3.34) grams (0.02 mole) of levo-ot-(meta-hydroxyphenyl)- 8-methylaminoethanol base and 3.59 grams (0.02 mole) of cyclohexylsulfamic acid were admixed and the resulting reaction mixture dissolved in twenty milliliters of warm ethanol. The resulting solution was concentrated to an oily residue by vacuum distillation, the oily matter slowly crystallizing. The resulting crystalline solid was dissolved in twenty milliliters of isopropanol and the solution diluted with ether, a slight turbidity being exhibited. Upon standing, a solid separated and was recrystallized from an isopropanol-ether mixture. Five and one-half grams (an eighty percent yield) of levo-w(meta-hydroxyphenyl)- methylaminoethanol sulfamate melting at 113-115 degrees centigrade was obtained as white, non-hygroscopic needles. The product exhibited a molecular weight of 346.44 and was soluble to the extent of forty percent in water at twenty degrees centigrade. It exhibited a pH of 6.2 in a one percent aqueous solution.

The specific rotation was (00 -27 in a 2.5 percent aqueous solution.

Analysis.Calculated for Found: 8.29.

Various modifications may be made in the present invention without departing from the spirit or scope thereof and it is to be understood that we limit ourselves only as defined in the appended claims.

We claim:

1. Levo a (meta-hydroxyphenyl) d-methylaminoethanol cyclohexylsulfamate.

2. The process which comprises: admixing equimolar quantities of levo-w(meta-hydroxyphenyl)-B-methylaminoethanol and cyclohexylsulfamic acid; and isolating the levo cc (meta hydroxyphenyl)-fi-methylaminoethanol cyclohexylsulfamate from the reaction product.

C15H2eN205S: N 8.09.

Roberts Mar. 10, 1942 Blythe Feb. 20, 1945 

1. LEVO -A- (META-HYDROXYPHENYL)-B-METHYLAMINOETH-
 1. A DOOR LOCKING DEVICE FOR DOORS OF COKING CHAMBERS OF HORIZONTAL COKE OVENS COMPRISING AN AXIALLY MOVABLE LATCH BOLT MEMBER, A LATCH BAR HUB MOUNTED ON SAID BOLT MEMBER, AND A LOCK SPRING COOPERATING WITH SAID HUB WHEREBY THE DOOR IS KEPT CLOSE TO THE DOOR FRAME OF THE OVEN CHAMBER BY PRESSURE OF SAID SPRING BETWEEN THE DOOR, AND SAID HUB IN LOCKING POSITION OF THE DOOR AND HUB, CHARACTERIZED BY A REVERSIBLE LATCH BAR HUB THAT IS REVERSIBLY MOUNTABLE ON SAID AXIALLY MOVABLE LATCH BOLT MEMBER, AN ABUTMENT MEMBER ON THE AXIALLY MOVABLE LATCH BOLT MEMBER AND A COORPERATING ABUTMENT ON THE LATCH BAR HUB WHICH COACT, IN ONE POSITION OF THE LATCH BAR HUB, TO TRANSMIT FORCE TO THE SPRING TO COMPRESS THE SAME TO RELEASE THE LATCH BAR HUB TO UNLOCKING POSITION RELATIVE TO THE DOOR, UPON AXIAL MOVEMENT OF THE AXIALLY MOVABLE LATCH BOLT MEMBER IN ONE DIRECTION, AND WHICH COACT IN THE REVERSED POSITION OF THE LATCH BAR HUB ON THE AXIALLY MOVABLE LATCH BOLT MEMBER TO TRANSMIT FORCE OF THE LATTER TO THE LATCH BAR HUB TO LOCK THE SAME WITH OMISSION OF THE LOCK ACTION OF THE LOCK SPRING, UPON AXIAL MOVEMENT OF THE AXIALLY MOVABLE LATCH BOLT MEMBER IN THE OPPOSITE DIRECTION TO THE DIRECTION IT MOVES TO COMPRESS SAID LOCK SPRING. 